Energy Efficient Lighting

Introduction to Energy Efficient Lighting

Artificial lighting consumes a significant part of all electrical energy consumed worldwide. Most importantly, for some buildings over 90 percent of lighting energy consumed can be an unnecessary expense through over-illumination. Lighting represents a significant energy end use in buildings and exterior applications. https://algonline.org/index.php?regulations-incentives

There are several strategies available to minimize energy requirements in any building such as, Analysis of lighting quality to ensure that adverse components of lighting (for example, glare or incorrect colour spectrum) are not biasing the design, Integration of space planning and interior architecture to lighting design, Design of time of day use that does not expend unnecessary energy, Selection of fixture and lamp types that reflect best available technology for energy conservation. Design recommendation with regards to lighting standards such as illumination levels, glare control, luminous efficacy and lighting power density should be followed. http://en.wikipedia.org/wiki/Architectural_lighting_design

There are five types of Design Criteria-codes and similar regulations that affect building lighting which are Electric codes (The National Electric Code ‘NFPA 70’ is used throughout the United States), Building codes (lighting in commercial and institutional buildings to permit safe egress in the event of an emergency), Energy codes (use a minimum of energy to operate specially in non-residential projects), Accessibility codes (The Americans with Disabilities Act ‘ADA’ requires sconces or other wall mounted lighting equipment along the path of egress) and health codes (‘hospitals and nursing homes to provide minimum light levels at certain locations’ and ‘a protective lens or other covering for lighting in commercial kitchens and cafeteria food service areas’). Energy codes establish a minimum level of energy efficiency or product performance for lighting systems installed in buildings. http://bcap-energy.org/

Increasingly strict energy codes have resulted in substantial energy savings as well as reduced operating costs for building owners as new buildings and retrofits have come on line with upgraded systems. International Green Building ratings systems have been developed, all of which emphasize on lighting design standards along with various parameters related to design, construction and operation of a green building. Supporting energy efficient and sustainable lighting are a few successful international rating systems like BREEAM (Building Research Establishment environment Assessment Method) – UK/ EU, CASBEE (Comprehensive Assessment System for Building Environmental Efficiency) – Japan, LEED (Leadership in Energy and Environmental Design) – US, LEED IGBC (Indian Green Building Council) & GRIHA (Green Rating for Integrated Habitat Assessment) – India, HK_BEAM (Hong Kong Building Environmental Assessment Method) – Hong Kong and Green Star – Australia.

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